The present invention relates to compositions containing an extract of processed Panax genus plant and saponin compounds isolated therefrom for treat the diseases caused by vascular injury in human or mammal, the method for treating said diseases using thereby and the use thereof. The extract of processed Panax genus plant and saponin compounds isolated therefrom shows suppressive effect on endothelial dysfunction and damage of blood-retinal on HUVEC and retinal vascular endothelial cell. Therefore, it can be used as the therapeutics or functional health food for treating and preventing the diseases caused by vascular injury.